Notezilla backs up notes automatically.
If you do not know where these backups are stored:
Go to Notezilla Preferences to find out. To access Notezilla 's Preferences, right click on Notezilla icon and choose Preferences from the menu. Then click on Advanced tab.
This video will show you how to restore Notezilla notes from backup:
(The video in above link assumes that you have access to Notezilla . However, if you don't then you can open the Notezilla data folder by opening the folder %appdata%\Conceptworld\Notezilla and follow the instructions given in the video. Copy this folder location and open it in Windows Explorer.)
2. In short, you would open Notezilla data folder %appdata%\Conceptworld\Notezilla and also open the backup folder %appdata%\Conceptworld\Notezilla\Backup and copy Notes8.db file from backup folder to the data folder. Do all this when Notezilla is not running.
Notezilla keeps 5 backups. If you cannot restore the previous day's backup, then try a little older one.
Go to Settings/General option to restore backup.